comapring specific locations in an array

This is a discussion on comapring specific locations in an array within the C Programming forums, part of the General Programming Boards category; Hi i have an array and wish to compare certain parts of the array to a string. For example i ...

  1. #1
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    comapring specific locations in an array

    Hi

    i have an array and wish to compare certain parts of the array to a string. For example i have the string "AB CD EF" and i want to test my string to see if it is of AB or CD or EF


    this is what i have done but does not seem to work

    Code:
    char temp[10];
    char to_b_tested[10];
    
    strncpy(temp, "AB CD EF", 8);
    if ((strncmp(temp[0], to_b_tested, 2) == 0) || 
        (strncmp(temp[3], to_b_tested, 2) == 0) || 
        (strncmp(temp[6], to_b_tested, 2) ==0))
    {
        ;//then do something
    }
    any hints?

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    assuming that there is something already in to_b_tested

  3. #3
    ATH0 quzah's Avatar
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    Code:
    if( strncmp( temp + offset, to_b_tested, 2 ) == 0 )
    Try that method. Instead of indexing the array, which gives you the character, not the address of it, use the above. Or apply the address-of operator to what you have. Remember, the function wants a pointer, not a character.


    Quzah.
    Hope is the first step on the road to disappointment.

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    thank you. also is %x to print in hex ?

  5. #5
    cwr
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    Quote Originally Posted by mbooka
    thank you. also is %x to print in hex ?
    You would know the answer to that if you (a) tried it or (b) looked up printf().

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    Devil's Advocate SlyMaelstrom's Avatar
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    It's like he thinks his computer will explode if he tries something without knowing its outcome.
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  7. #7
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    to be honest i already tried it before posting it. There are so many ways to do one thing and i was just seeing if there are better ways to do one thing.

    Is there a site that has good c programming references? Either i am bad at using the search engine or there is not many good sites out there. (Personally i think i sux at using the search engine =p)

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